Nutritional Biochemistry MCQs

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1. : Which of the following is the main storage form of carbohydrates in animals?





2. : Enzymes that speed up biochemical reactions are mainly composed of:





3. : Which vitamin acts as a coenzyme in carbohydrate metabolism?





4. : The end product of glycolysis is:





5. : Which biomolecule provides the highest energy per gram?





6. : The urea cycle primarily occurs in which organ?





7. : Which vitamin is a cofactor for collagen synthesis?





8. : The process of converting glucose to glycogen is called:





9. : The biochemical breakdown of fats produces:





10. : Which enzyme catalyzes the conversion of starch to maltose?





11. : The TCA cycle occurs in the:





12. : Which of the following is a ketogenic amino acid?





13. : NAD⁺ functions as a:





14. : The process of glucose synthesis from non-carbohydrate sources is known as:





15. : The enzyme lipase helps in the digestion of:





16. : The oxidation of one molecule of glucose yields approximately:





17. : Which of the following is a water-soluble vitamin?





18. : What is the main nitrogenous waste product in humans?





19. : The enzyme responsible for breaking down proteins into peptides is:





20. : Beta-oxidation of fatty acids occurs in the:





21. : The main function of insulin is to:





22. : Which vitamin acts as a coenzyme in amino acid metabolism?





23. : The Cori cycle connects which two organs?





24. : The deficiency of Vitamin B₁₂ causes:





25. : Which metabolic pathway produces lactic acid during oxygen deficiency?





26. : The enzyme hexokinase catalyzes the:





27. : The main function of coenzyme Q (ubiquinone) is in:





28. : The main lipid found in cell membranes is:





29. : The conversion of pyruvate to lactate is catalyzed by:





30. : Which mineral acts as a cofactor for many enzymes?





31. : Which vitamin is essential for oxidative phosphorylation?





32. : The hormone glucagon mainly acts on the:





33. : Cholesterol is a precursor of:





34. : The enzyme responsible for DNA synthesis is:





35. : The RQ (Respiratory Quotient) for carbohydrate metabolism is:





36. : Which vitamin prevents oxidative damage to cells?





37. : The main site of protein synthesis is:





38. : Which amino acid is the precursor of serotonin?





39. : Which of the following is a reducing sugar?





40. : Fatty acids are transported in the blood as:





41. : The enzyme responsible for fat digestion in the small intestine is:





42. : Which vitamin deficiency causes megaloblastic anemia?





43. : The process by which amino groups are removed from amino acids is called:





44. : The enzyme that converts sucrose into glucose and fructose is:





45. : The term “essential amino acids” refers to those which:





46. : Which vitamin is required for blood coagulation?





47. : Gluconeogenesis occurs mainly during:





48. : Which compound is the common intermediate in carbohydrate, fat, and protein metabolism?





49. : The deficiency of niacin results in:





50. : The first step in protein digestion occurs in the:





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